My uncle told me to always use a string line for vinyl fence posts, and I finally get it
He said, 'If you eyeball it, you'll pay for it later.' For years I thought it was just extra work, especially on short runs. Then I did a 50-foot section for a client in Springfield last fall without one, just going off the old fence line. By spring, three posts had visibly shifted and the whole line had a wave. Had to go back and fix it on my own time, which was basically a full day's pay gone. Now I set that line every single time, no exceptions. Anyone else have a 'simple' step they skipped that came back to bite them?